Prime Number Checker
Understanding Prime Numbers
A prime number is a whole number greater than 1 that has no positive divisors other than 1 and itself.
Examples
The first few prime numbers are 2, 3, 5, 7, 11, 13, 17, 19, 23, and 29.
Checking for Primality
This calculator uses trial division. It checks to see if the number is divisible by any integer between 2 and its square root. If it finds a divisor, the number is not prime. Otherwise, it is prime.
Check if a number is prime.
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